Răspuns:
Explicație pas cu pas:
√(7⁴ × 4) = √[ (7²)² × 2² ] = √(49² × 2²) = 49 × 2 = 98
[tex]\displaystyle\bf\\ \sqrt{7^4\times4}=\\\\=\sqrt{7^{2\times2}\times2^2}=\\\\=\sqrt{\Big(7^2\Big)^2\times2^2}=\\\\=\sqrt{\Big(7^2\times2\Big)^2}=\\\\=7^2\times2=49\times2=\boxed{\bf98}[/tex]
